What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-16) A test cell run of the engine on the mishap aircraft was performed on 13 nov 97. The engine started and ran normally, no indication of engine failure was found. As a result, airworthiness factors as a cause of the accident cannot be proved or disproved. The fact remains that both the pilots and ground observers reported a loud backfire reporting from the engine just after takeoff. The mishap could also resulted from pilot error due to the selection of the tip tanks as a fuel source during takeoff resulting in fuel starvation. However, both pilots clearly stated that the maintanks were selected for takeoff. The aircraft had arrived one hour or so earlier from conneticut where the aircraft had been refueled. It is not likely that the tank selector was in any position other than main tank upon landing and doubtful that this selector was moved from this position. At any rae both pilots were adamant that the tank selector was in main. Both pilot error and airworthiness causes cannot be determined as factors or causes of this mishap; the factors in this mishap are unknown.
As the FAA filed it
(-16) A TEST CELL RUN OF THE ENGINE ON THE MISHAP AIRCRAFT WAS PERFORMED ON 13 NOV 97. THE ENGINE STARTED AND RAN NORMALLY, NO INDICATION OF ENGINE FAILURE WAS FOUND. AS A RESULT, AIRWORTHINESS FACTORS AS A CAUSE OF THE ACCIDENT CANNOT BE PROVED OR DISPROVED. THE FACT REMAINS THAT BOTH THE PILOTS AND GROUND OBSERVERS REPORTED A LOUD BACKFIRE REPORTING FROM THE ENGINE JUST AFTER TAKEOFF. THE MISHAP COULD ALSO RESULTED FROM PILOT ERROR DUE TO THE SELECTION OF THE TIP TANKS AS A FUEL SOURCE DURING TAKEOFF RESULTING IN FUEL STARVATION. HOWEVER, BOTH PILOTS CLEARLY STATED THAT THE MAINTANKS WERE SELECTED FOR TAKEOFF. THE AIRCRAFT HAD ARRIVED ONE HOUR OR SO EARLIER FROM CONNETICUT WHERE THE AIRCRAFT HAD BEEN REFUELED. IT IS NOT LIKELY THAT THE TANK SELECTOR WAS IN ANY POSITION OTHER THAN MAIN TANK UPON LANDING AND DOUBTFUL THAT THIS SELECTOR WAS MOVED FROM THIS POSITION. AT ANY RAE BOTH PILOTS WERE ADAMANT THAT THE TANK SELECTOR WAS IN MAIN. BOTH PILOT ERROR AND AIRWORTHINESS CAUSES CANNOT BE DETERMINED AS FACTORS OR CAUSES OF THIS MISHAP; THE FACTORS IN THIS MISHAP ARE UNKNOWN.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.